18900194911 has 8 divisors (see below), whose sum is σ = 21055920480. Its totient is φ = 16844735712.

The previous prime is 18900194909. The next prime is 18900194927. The reversal of 18900194911 is 11949100981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18900194911 - 2¹ = 18900194909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900194611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25066195 + ... + 25066948.

It is an arithmetic number, because the mean of its divisors is an integer number (2631990060).

Almost surely, 2^18900194911 is an apocalyptic number.

18900194911 is a deficient number, since it is larger than the sum of its proper divisors (2155725569).

18900194911 is a wasteful number, since it uses less digits than its factorization.

18900194911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50133185.

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 18900194911 in words is "eighteen billion, nine hundred million, one hundred ninety-four thousand, nine hundred eleven".